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annotate dep/animone/src/util/win32.cc @ 338:f63dfa309380

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dep/animone: separate *BSD into separate files they are wholly different operating systems with very different kernels on the inside
author Paper <paper@paper.us.eu.org>
date Wed, 19 Jun 2024 13:06:10 -0400
parents a7d4e5107531
children 74e2365326c6
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a4257370de16 dep/animone: prepare for v1.0 release; it should be ready by now
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1 /*
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2 * util/win32.cc: utility functions only useful on windows
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3 */
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4 #include "animone/util/win32.h"
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5
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6 #include <shlobj.h> /* SHGetKnownFolderPath */
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7 #include <subauth.h> /* UNICODE_STRING */
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8 #include <windows.h>
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9
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10 namespace animone::internal::win32 {
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11
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12 std::string ToUtf8String(const std::wstring& string) {
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13 if (string.empty())
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14 return std::string();
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15
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16 long size = ::WideCharToMultiByte(CP_UTF8, 0, string.c_str(), string.length(), nullptr, 0, nullptr, nullptr);
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17 std::string ret(size, '\0');
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18 ::WideCharToMultiByte(CP_UTF8, 0, string.c_str(), string.length(), &ret.front(), ret.length(), nullptr, nullptr);
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19 return ret;
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20 }
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21
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22 std::string ToUtf8String(const UNICODE_STRING& string) {
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23 const auto wctomb = [&string](LPSTR out, int size) -> int {
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24 return ::WideCharToMultiByte(CP_UTF8, 0, string.Buffer, string.Length, out, size, nullptr, nullptr);
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25 };
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26
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27 if (string.Length <= 0)
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28 return std::string();
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29
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30 long size = wctomb(nullptr, 0);
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31 std::string ret(size, '\0');
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32 wctomb(&ret.front(), ret.length());
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33 return ret;
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34 }
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35
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36 std::wstring ToWstring(const std::string& string) {
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37 const auto mbtowc = [&string](LPWSTR out, int size) -> int {
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38 return ::MultiByteToWideChar(CP_UTF8, 0, string.c_str(), string.length(), out, size);
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39 };
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40
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41 if (string.empty())
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42 return std::wstring();
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43
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44 long size = mbtowc(nullptr, 0);
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45 std::wstring ret(size, L'\0');
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46 mbtowc(&ret.front(), ret.length());
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47 return ret;
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48 }
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49
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50 std::string GetProcessPath(DWORD process_id) {
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51 // If we try to open a SYSTEM process, this function fails and the last error
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52 // code is ERROR_ACCESS_DENIED.
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53 //
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54 // Note that if we requested PROCESS_QUERY_INFORMATION access right instead
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55 // of PROCESS_QUERY_LIMITED_INFORMATION, this function would fail when used
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56 // to open an elevated process.
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57 Handle process_handle(::OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, process_id));
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58
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59 if (!process_handle)
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60 return std::wstring();
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61
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62 std::wstring buffer(MAX_PATH, L'\0');
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63 DWORD buf_size = buffer.length();
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64
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65 // Note that this function requires Windows Vista or above. You may use
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66 // GetProcessImageFileName or GetModuleFileNameEx on earlier versions.
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67 if (!::QueryFullProcessImageNameW(process_handle.get(), 0, &buffer.front(), &buf_size))
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68 return std::wstring();
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69
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70 buffer.resize(buf_size);
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71 return ToUtf8String(buffer);
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72 }
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73
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74 std::string GetFileNameFromPath(const std::string& path) {
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75 const auto pos = path.find_last_of(L"/\\");
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76 return pos != std::wstring::npos ? path.substr(pos + 1) : path;
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77 }
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78
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79 static std::wstring GetSystemDirectory() {
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80 PWSTR path_wch;
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81 SHGetFolderPathW(NULL, CSIDL_WINDOWS, NULL, SHGFP_TYPE_CURRENT, &path_wch);
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82 std::wstring path_wstr(path_wch);
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83 CoTaskMemFree(path_wch);
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84 return path_wstr;
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85 }
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86
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87 bool IsSystemDirectory(const std::string& path) {
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88 return IsSystemDirectory(ToWstring(path));
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89 }
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90
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91 bool IsSystemDirectory(std::wstring path) {
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92 ::CharUpperBuffW(&path.front(), path.length());
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93
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94 std::wstring windir = GetSystemDirectory();
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95 ::CharUpperBuffW(&windir.front(), windir.length());
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96
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97 // XXX wtf is 4?
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98 return path.find(windir) == 4;
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99 }
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100
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101 bool VerifyProcessPath(const std::string& path) {
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102 return !path.empty() && !IsSystemDirectory(path);
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103 }
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104
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105 bool VerifyProcessFileName(const std::string& name) {
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106 static const std::set<std::string> invalid_names = {
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107 // System files
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108 "explorer.exe", // Windows Explorer
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109 "taskeng.exe", // Task Scheduler Engine
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110 "taskhost.exe", // Host Process for Windows Tasks
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111 "taskhostex.exe", // Host Process for Windows Tasks
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112 "taskmgr.exe", // Task Manager
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113 "services.exe", // Service Control Manager
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114 };
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115
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116 if (name.empty())
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117 return false;
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118
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119 for (const auto& invalid_name : invalid_names)
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120 if (util::EqualStrings(name, invalid_name))
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121 return false;
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122
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123 return true;
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124 }
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125
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126 } // namespace animone::internal::win32